JP7236629B6 - Distributed Transducer Suspension Cone (DTSC) - Google Patents

Description

The present invention relates to the field of loudspeakers. More specifically, the present invention relates to a speaker device comprising a frame, two opposed diaphragms, and two speaker drivers.

Loudspeakers are described, for example, in US Pat. No. 6,853,734, US Pat. No. 7,366,318 and US Pat. No. 8,311,263.

The present invention seeks to provide a loudspeaker device having the smallest possible external dimensions and yet having high performance and linearity.

According to the present invention, there is provided a loudspeaker device as described above, wherein each loudspeaker driver comprises at least one magnetic driver for driving two opposing diaphragms in operation. The speaker apparatus further comprises a speaker damper associated with each of the two opposing diaphragms, the speaker damper arranged to be driven by the associated at least one magnetic driver, the coil bracket and the vibration damper. A diaphragm connecting member arranged to fixedly attach the plate to the speaker damper and a damper frame connecting member arranged to fix the speaker damper to the frame. The speaker damper further includes a damper leg member arranged between the diaphragm connecting member and the damper frame connecting member.

The invention is discussed in more detail below with reference to the accompanying drawings.

1 is a perspective view showing a dual cone speaker device; FIG. 1 is a cross-sectional view showing a dual cone speaker device; FIG. 1 is a perspective view showing one embodiment of a speaker device according to one embodiment of the present invention; FIG. Fig. 2 is a perspective view showing parts of a speaker device suitable for further embodiments of the invention; Fig. 3 is a cross-sectional view showing parts of a loudspeaker device suitable for further embodiments of the present invention; Fig. 3 is a detailed view showing parts of a loudspeaker device suitable for further embodiments of the invention;

The present invention will now be described in detail with reference to the several drawings which are intended only to illustrate embodiments of the invention and not to limit its scope. The scope of the invention is defined in the appended claims and their technical equivalents. That is, those skilled in the art will understand that the features, components, elements, etc. that are explicitly used to describe the present invention can be substituted with technical equivalents unless otherwise stated. Further, separate features of different embodiments may be combined, even though not explicitly shown in the drawings or described herein, unless such combination is physically impracticable.

The invention is discussed in more detail below with reference to some drawings.

The examples and embodiments described herein serve to illustrate rather than limit the invention. Those skilled in the art could design alternative embodiments without departing from the scope of the claims. Any reference signs placed between parentheses in the claims shall not be construed as limiting the claim. Items recited in the claims or as separate entities in this specification may be embodied as a single item of hardware or as multiple items of hardware combining the features of the recited items.

It should be understood that the present invention is limited only by the appended claims and their technical equivalents. As used herein and in the claims, the verb "comprise" and its conjugations means the inclusion of items following the word, without excluding items not specifically mentioned. is used in its non-limiting sense. In addition, when referring to an element with the indefinite article "a" or "an", the presence of a plurality of such elements is excluded unless the context clearly indicates the presence of only one such element. do not. Thus, the indefinite article "a" or "an" usually means "at least one."

In loudspeakers that use the dual opposing driver principle in the conventional sense, the drivers are arranged in a back-to-back position.

An advantage of this architecture is that the opposing drivers cancel the mechanical vibrations of the housing. Because of this cancellation, the housing is significantly less affected by the driver's motion, even though the housing is relatively light, stiff, and/or small in relation to the driver. The drawback is that the footprint is constrained to at least twice the depth of the same driver.

For example, as described in Applicant's unpublished Dutch Patent Application No. 1042617, incorporated herein by reference, driver aggregation is the minimum required in a loudspeaker design. It is one way to reduce volume. In the situation where the opposing drivers are clustered and the magnet motors are placed in the same plane, the dynamic speaker's second suspension or damper ('spider') is placed between the two transducers due to the stationary position of the opposing drivers. It does not fit and due to the physical constriction at the medial deflection the spiders of the opposing drivers will cross over. The spider is a necessary component for linear excursion, which is necessary for high quality sound reproduction. Since the opposing diaphragms meet at the center of the speaker at maximum sound pressure level, the suspension cannot align with the two opposing driver diaphragms as the diaphragms will collide.

1A and 1B (which are reproductions of FIGS. 4A and 4B of the above-noted unpublished patent application) show perspective and cross-sectional views of speaker device 300. Brackets 360, 360' of speaker device 300 are shown. are integrally formed with rings 362, 362' attached respectively to diaphragms 312, 314. In the illustrated embodiment, brackets 360, 360' are integrally formed with diaphragms 312, 314.

The motors 330, 330' of the speaker device 300 are arranged in pairs, with the former 336 of each motor pair 330, 330' being coupled to one of the brackets 360, 360'. Motor pairs 330 , 330 ′ are alternately arranged around frame 316 . As shown, there are two pairs of motors 330, 330' for each diaphragm 312, 314, respectively. By arranging the motors 330, 330' in pairs sharing a common bracket 360, 360', the four motors for each diaphragm are evenly spaced around the diaphragm, thus requiring four brackets. Compared to the arrangement, the efficiency of moving the diaphragms 312, 314 is increased and the mass of the brackets 360, 360' can also be reduced.

The speaker system 300 uses motors 330, 330' with a plurality of magnets 332, 332' as shown. Each motor 330, 330' comprises two magnets 332, 332' arranged to increase the excursion of the voice coil 334, 334' and thus of the diaphragm 312, 314.

The present invention relates to a loudspeaker device of the type with Distributed Transducer Suspension Cone, DTSC, an exemplary embodiment of which is shown in perspective view in FIG. The speaker device 1 comprises a frame 2 and two opposing diaphragms 3 (only one is visible in FIG. 2). The speaker damper 5 comprises a plurality of coil brackets 4 which in operation are connected to the moving coil components of the speaker driver 10 (similar to the motors 330, 330' described above). In the illustrated exemplary embodiment, there are two speaker dampers 5 for each diaphragm 3 , each speaker damper 5 having three coil brackets 4 . Note that different numbers of speaker dampers 5 and coil brackets 4 may be implemented per diaphragm, see also the alternative exemplary embodiments described below. Generally speaking, in one group of embodiments, the number of coil brackets 4 of each speaker damper 5, 5 is at least two. In another group of embodiments, speaker dampers 5 are present on two opposite sides of each of the two opposing diaphragms 3 .

Diaphragm 3 is connected to speaker damper 5 via diaphragm connecting member 6 (only one is visible in FIG. 2, but provided on two opposite sides of diaphragm 3). Further, the speaker damper 5 comprises damper frame connecting members 8 at both ends of the speaker damper 5 for connecting the speaker damper 5 to frame connecting elements 9, the frame connecting elements 9 being part of the frame 2, e.g. It is implemented as a pin as shown in the embodiment of FIG. Further, the speaker damper 5 includes a damper leg member 7 positioned between the coil bracket 4 and the damper frame connecting member 8 .

Generally speaking, in accordance with the present invention, a loudspeaker device is provided in various embodiments, the loudspeaker device 1 comprising a frame 2, two oppositely oriented diaphragms 3, 3' and two oppositely oriented diaphragms 3, 3' in operation. two loudspeaker drivers each having at least one magnetic driver 10, 10' for driving the oriented diaphragms 3, 3'. The speaker device 1 further comprises a speaker damper 5, 5' associated with each of the two opposing diaphragms 3, 3', the speaker damper 5, 5' having an associated at least one magnetic driver 10, coil brackets 4, 4' arranged to be driven by 10' and diaphragm connecting members 6, 6' arranged to fixedly attach the diaphragms 3, 3' to the speaker dampers 5, 5'. and damper frame connecting members 8, 8' arranged to fix the speaker dampers 5, 5' to the frame 2. - 特許庁The speaker dampers 5, 5' further comprise damper leg members 7, 7' arranged between the diaphragm connecting members 6, 6' and the damper frame connecting members 8, 8'.

The structure of the present embodiment of the loudspeaker device provides the loudspeaker device 1 with a linearly-fitting, flexible, elastic diaphragm connected between the frame 2 and the coil brackets 4 of each associated diaphragm 3. , providing a flat speaker damper 5 and allowing the 'spider' of both drivers/motors 10 to intersect the center plane of the speaker system 1 without collision. Note that similar elements in the embodiments described herein with reference to the figures refer to similar or identical elements represented by their reference numerals.

In a particular group of embodiments, this structure is exploited by fabricating the diaphragm 3 and speaker damper 5 combination as a single work piece, for example injection molded. 3 to 5 show further exemplary embodiments of the DTSC type of the loudspeaker device 1 according to the invention. In these figures, the frame 2 and motor/driver element 10 of the loudspeaker device 1 have been omitted in order to more clearly show the structural relationships and dimensions of the components directly associated with the loudspeaker damper 5 .

As shown in FIG. 3, this embodiment clearly shows the presence of (opposing) diaphragms 3, 3'. Associated elements of the lower diaphragm 3' are indicated by primed reference numerals. A speaker damper 5 is provided on each side of the diaphragm 3 and in this example it is clearly shown that each speaker damper 5 comprises two coil brackets 4 . From the perspective view of FIG. 3 and the cross-sectional view of FIG. 4, it can be seen that all the elements forming the speaker damper 5 and its connection to the diaphragm 3 and frame 2 are the same on each side of the diaphragm 3. One thing is clear. Further, the various elements are also the same for the opposing diaphragm 3'. In other words, the lower set of speaker damper 5' and diaphragm 3' is the same as the upper set of speaker damper 5 and diaphragm 3, but now upside down and rotated 90 degrees.

In all the embodiments described herein, a further optional feature of embodiments of the present invention, i.e. the speaker dampers 5, 5' (relative to the centerline of the associated diaphragms 3, 3' ) features that are mirror symmetric are shown. This is useful in providing a proper linear response of the speaker system 1 and facilitates manufacturing of the speaker dampers 5, 5'.

Also as shown in these embodiments, two sets of speaker dampers 5, 5' can be attached to the frame 2 such that the damper frame connecting members 8, 8' extend 9, eg, 3-4 mm in the direction of motion of the diaphragm. distance), this allows all sides of the speaker dampers 5, 5' to be attached at only four locations on the frame 2, and all the components of the speaker dampers 5, 5' to be placed inside the low speaker device 1. positioning becomes possible. This also makes it possible to position all the elements of the loudspeaker damper 5 that are in motion during operation outside the space between the opposing diaphragms 3, 3'.

FIG. 5 shows a detailed view of a portion of the speaker device 1 of FIG. Fig. 3 shows a perspective view; The connection of the damper leg members 7 to the diaphragm connection member 6 is performed using leg mounts 7a, which allow suitable transmission of forces and movements. The shape and material of the damper leg members 7 are such that an elastic linear behavior in the vertical direction of the diaphragm 3 is achieved. In one embodiment, for this purpose the damper leg members (7, 7') comprise an elastic material.

For example, the damper leg members 7 can be implemented as strip-like elements whose width is greater than their thickness, or even as flat strips. Furthermore, implementing the damper leg member 7 as a bent strip [claim 5], i.e. with a pattern that deviates from a straight line between the damper frame connecting member 8 and the leg mount 7 (or coil bracket 4). can improve elasticity. In certain exemplary embodiments, the damper leg members (7, 7') have a length greater than the shortest distance between the coil brackets (4, 4') and the damper frame connecting members (8, 8'). .

As a further example, the damper legs 7 initially point out, then turn left 90 degrees, and then turn left 135 degrees toward the damper frame connecting member 8, as shown in the embodiment of FIG. It may have a tangential connection to the coil bracket 4 or, alternatively, as shown in the embodiment of FIGS. It may have a tangential connection to the coil bracket 4 that bends 180 degrees towards the . By having the internal space of the frame 2 of the speaker device 1 as a substantially rectangular shape, the outer corner regions of the coil bracket 4 can be used to position the (bent) damper leg members 7 . In other words, in another embodiment the damper leg members (7, 7') are positioned in the corner regions of the frame (2).

As described above with reference to the embodiments shown in FIGS. 2-5, instead of the single object spider in the prior art loudspeaker apparatus, the DTSC-type loudspeaker apparatus comprises a plurality of separate suspension units (i.e. , and a speaker damper 5). Each separate suspension unit (speaker damper 5) is placed in the same outer peripheral area within the frame 2 as the magnet structure of the speaker device 1 or outside the outer periphery of the (magnet) motor. In any event, the loudspeaker damper 5 is at least not directly behind the two opposing driver diaphragms 3, 3'. The speaker damper 5 (or spider suspension unit) can have many different shapes and materials, but the most important properties are:
A loudspeaker damper 5 (spider suspension unit) connects the diaphragm 3 (cone) to the frame 2 at multiple locations (i.e. via frame connecting elements 9) to avoid non-linear motion;
The components of the speaker damper 5 ('spider objects') move in the same plane when the drivers (i.e. the coil brackets 4 described above) are deflected towards each other from their rest position; and ('spider object') is around the diaphragm, not directly behind the diaphragm 3,3;
Note that .

Relevant features of further exemplary embodiments are as follows.

There is a minimum of two suspension units (ie speaker dampers 5) per driver/motor/coil and no maximum.

Due to the material and shape of the speaker damper 5, the speaker damper 5 has the most flexibility in the direction of driver/motor excursion to prevent non-linear driver/motor excursions.

The speaker damper 5 can be fixed to the diaphragm 3, coil or coil bracket 4 (i.e. directly to the diaphragm 3 or to the coil or coil bracket 4) at a location between the top and bottom of the associated element. can.

Due to the distributed (more specifically DCST) configuration, the loudspeaker dampers 5 present in the loudspeaker device 1 are never all connected to the same coil, coil bracket 4 or diaphragm 3 at the same position.

The diaphragms 3, 3' in their rest position have a distance between them which is at least twice as long as the driver excursion of the motor driver 10 in one direction. In other words, the two opposing diaphragms 3, 3' are at a mutual distance at rest equal to twice the operating deflection distance of at least one motor driver 10, 10'. This ensures the highest possible amplitude of the diaphragms 3, 3' without the risk of the diaphragms 3, 3' or nearby components interfering with each other.

Two diaphragms 3 , 3 ′ are placed facing each other and both are fixed at the ends of separate speaker dampers 5 .

A separate speaker damper 5 is adjacent to the coil bracket 4 and remains within the bounding box formed by the coil bracket 4 . The loudspeaker damper 5 is, for example, adjacent to the coil bracket 4 on the long side of the frame 2, ie in the corner regions of the frame 2 (as shown in the exemplary embodiment described with reference to FIGS. 2-5). It is also possible that it is not in The only place where the loudspeaker damper 5 cannot be positioned is in the middle of the diaphragm 3, 3'.

The shape of the diaphragms 3, 3' (or cones) is made such that there is a distance between the diaphragms 3, 3' at least equal to the combined maximum inward deflection of both diaphragms 3, 3'. be done. For example, if both upper diaphragm 3 and lower diaphragm 3' separately have a half-amplitude excursion of distance x, the distance between diaphragms 3, 3' is distance 2x.

The invention has been described above with reference to some exemplary embodiments shown in the drawings. Modifications and alternative implementations of some parts or elements are possible and fall within the scope of protection defined in the appended claims.

Claims (11)

a frame (2), two opposing diaphragms (3,3') and at least one magnetic driver (10, 10′), each comprising: a speaker device (1) comprising:
further comprising at least two speaker dampers (5, 5' ) associated with the two opposing diaphragms (3, 3');
a coil bracket (4, 4') arranged such that each of said at least two speaker dampers (5, 5') is driven by said at least one associated magnetic driver (10, 10'); Diaphragm connection members (6, 6') arranged to fixedly attach the diaphragm (3, 3') to the speaker damper (5, 5'); and the speaker damper (5, 5'). a damper frame connection member (8, 8') arranged to fix the to the frame (2);
Each of the at least two speaker dampers (5, 5') is a damper leg member ( 7, 7′) ,
A speaker device (1), wherein said at least two speaker dampers (5, 5') are positioned around said two opposing diaphragms (3, 3'). A loudspeaker device (1) according to claim 1, wherein said damper leg members (7, 7') comprise an elastic material. A loudspeaker device (1) according to claim 1 , wherein said damper leg members (7, 7') are flat strips. 2. According to claim 1 , wherein said damper leg members (7, 7') have a length greater than the shortest distance between said coil brackets (4, 4') and said damper frame connecting members (8, 8'). A speaker device (1) as described. A loudspeaker device (1) according to claim 1 , wherein said damper leg members (7, 7') are meandering strips. A loudspeaker device (1) according to claim 1 , wherein said damper leg members (7, 7') are positioned in corner regions of said frame (2). 2. The loudspeaker device (1) according to claim 1 , wherein the loudspeaker damper (5, 5') is mirror symmetrical. A loudspeaker device (1) according to claim 1 , wherein the number of said coil brackets (4, 4') of each loudspeaker damper (5, 5') is at least two. 2. According to claim 1 , wherein said two opposing diaphragms (3, 3') are at a mutual distance at rest equal to twice the operating deflection distance of said at least one magnetic driver (10, 10'). A speaker device (1) as described. A loudspeaker device (1) according to claim 1 , wherein said loudspeaker dampers (5, 5') are present on two opposite sides of each of said two opposed diaphragms (3, 3'). 11. Loudspeaker device (1) according to claim 10, wherein the combination of the diaphragm (3, 3') and the loudspeaker damper (5, 5') is a single work piece.

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